AEST to CST Converter

Australian Eastern Standard Time → Central Standard Time · AEST is 16 hours ahead of CST

AEST
—
CST
—

AEST and CST are the same time

AEST to CST Conversion Table

AESTCST
12:00 AM12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

Green rows = business hours overlap (9:00 AM – 6:00 PM AEST)

Major AEST Cities
  • Sydney
  • Melbourne
  • Brisbane
  • Canberra
  • Newcastle
  • Wollongong
Major CST Cities
  • Chicago, IL
  • Houston, TX
  • Dallas, TX
  • Minneapolis, MN
  • Kansas City, MO
  • New Orleans, LA
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AEST vs CST — Sydney to Chicago

AEST (UTC+10) — Australian Eastern Standard Time. NSW, VIC, ACT, and TAS shift to AEDT (UTC+11) in summer (October–April). Queensland stays on AEST year-round.

CST (UTC-6) — US Central Standard Time. Chicago, Houston, and Dallas shift to CDT (UTC-5) in summer (March–November).

With a 16-hour gap, Australia is effectively a full day ahead. The only practical overlap is Sydney late evening meeting Chicago morning. Async workflows are the norm for Australia–Central US teams.

Frequently Asked Questions

How many hours is AEST ahead of CST?

AEST (Australian Eastern Standard Time, UTC+10) is 16 hours ahead of CST (Central Standard Time, UTC-6). During Australian DST, AEDT (UTC+11) is 17 hours ahead of CST. During US CDT (UTC-5), AEST is 15 hours ahead. The gap ranges between 15–17 hours depending on which regions observe daylight saving.

What is 9 AM AEST in CST?

9:00 AM AEST (Sydney) is 5:00 PM CST the previous day. For example, Tuesday 9:00 AM Sydney = Monday 5:00 PM Chicago (in winter). Australia and the US observe DST in opposite hemispheres (Australia: October–April, US: March–November), so the gap shifts throughout the year.

What is the best time to call Chicago from Sydney?

The best overlap window is 7:00–9:00 AM CST (Chicago), which equals 11:00 PM–1:00 AM AEST (Sydney, next day). Alternatively, early Chicago morning (6:00–8:00 AM CST) = 10:00 PM–midnight Sydney. Both options require Sydney participants to work late evenings.

Does Brisbane differ from Sydney for AEST to CST?

Yes. Queensland (Brisbane) does not observe DST and stays on AEST (UTC+10) year-round. During Australian DST (October–April), Sydney and Melbourne shift to AEDT (UTC+11), making Brisbane 1 hour behind Sydney. For AEST-to-CST conversions, Brisbane is always 16 hours ahead of CST.